feat(connections): add self-serve intent runtime (#12345)

## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - Agents need a governed way to request app connections during issue
work.
> - The catalog now describes the available providers and setup methods.
> - A request must become a durable, company-scoped intent before an
operator acts on it.
> - This pull request adds that intent runtime across server, agent,
CLI, and shared contracts.
> - The benefit is a safe bridge from agent need to operator-approved
setup.

## Linked Issues or Issue Description

Refs #11965

This is stack 7 of 11. It depends on stack 6 and replaces another
reviewable part of #11965.

## What Changed

- Add connection intent types, validation, service logic, and routes.
- Add agent runtime tools and CLI support for connection requests.
- Add issue-thread interaction support for connection intents.
- Add runtime, route, adapter, and contract tests.
- Hold the final resolved-continuation row lock through asynchronous
adapter preparation until an actual process spawn, so parking or
reassignment cannot cross that boundary.
- Report Hermes Gateway's first remote run request through the shared
dispatch hook so the resolved-intent lock is released at the true
dispatch boundary.
- Revalidate the addressed user's live non-viewer membership and
connection-management authority for every intent mutation, including
OAuth completion.

## Verification

- `pnpm --filter @paperclipai/server typecheck`
- `pnpm --filter @paperclipai/server exec vitest run
src/__tests__/tool-access-service.test.ts`
- Result: 176 tests passed.
- `pnpm build`
- `pnpm --filter @paperclipai/server exec vitest run
src/__tests__/heartbeat-stale-queue-invalidation.test.ts` (32 passed;
includes non-process dispatch lock-release coverage)
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/connection-intents-service.test.ts -t
"addressed-user mutation"` (1 passed)
- `pnpm exec vitest run --project @paperclipai/server
server/src/__tests__/tool-access-service.test.ts -t "binds OAuth
callback completion to the initiating board session"` (1 passed)
- `pnpm --filter @paperclipai/hermes-paperclip-adapter test --
src/gateway/server/execute.test.ts` (23 passed; includes dispatch-hook
ordering and exactly-once coverage)
- `pnpm --filter @paperclipai/hermes-paperclip-adapter typecheck`

## Risks

- A malformed intent could create an unusable operator request.
- Validators and company checks reject invalid or cross-company
requests.
- The final continuation gate holds the issue row lock through adapter
preparation until process or remote dispatch; later operator changes use
the normal active-run interruption path.
- The change does not add a database migration.

> I checked `ROADMAP.md`. This stack continues the existing app
connection work from #11965 and does not duplicate another planned item.

## Model Used

OpenAI Codex, GPT-5. The runtime model ID and context window were not
exposed. The model used reasoning, tool use, and code execution.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have linked the public source pull request with `Refs #`
- [x] I have not referenced internal or instance-local Paperclip issues
or links
- [x] My branch name describes the change and contains no internal
Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

packages/shared/src/validators/issue.ts

@@ -756,6 +756,50 @@ export const issueThreadInteractionContinuationPolicySchema = z.enum(
   ISSUE_THREAD_INTERACTION_CONTINUATION_POLICIES,
 );
 
+export const connectionIntentPhaseSchema = z.enum(["requested", "authorizing", "needs_retry"]);
+const connectionIntentBrandAssetSchema = z.string().max(2048).refine((value) => {
+  if (/^\/brands\/apps\/[a-z0-9][a-z0-9._-]*\.(?:svg|png)$/i.test(value)) return true;
+  try {
+    return new URL(value).protocol === "https:";
+  } catch {
+    return false;
+  }
+}, "Connection intent brand assets must be HTTPS URLs or local app brand paths");
+
+export const connectionIntentPayloadSchema = z.object({
+  version: z.literal(1),
+  serviceSlug: z.string().trim().min(1).max(120),
+  serviceName: z.string().trim().min(1).max(160),
+  serviceLogoUrl: connectionIntentBrandAssetSchema.nullable().optional(),
+  serviceDarkLogoUrl: connectionIntentBrandAssetSchema.nullable().optional(),
+  requestingAgentId: z.string().guid(),
+  requestingAgentName: z.string().trim().min(1).max(160),
+  phase: connectionIntentPhaseSchema,
+}).strict();
+
+export const connectionIntentResultSchema = z.object({
+  version: z.literal(1),
+  outcome: z.enum(["connected", "declined", "superseded", "expired"]),
+  connectionId: z.string().guid().nullable().optional(),
+  reason: z.string().trim().max(4000).nullable().optional(),
+  supersededByInteractionId: z.string().guid().nullable().optional(),
+}).strict().superRefine((value, ctx) => {
+  if (value.outcome === "connected" && !value.connectionId) {
+    ctx.addIssue({
+      code: z.ZodIssueCode.custom,
+      path: ["connectionId"],
+      message: "Connected intents require a connection id",
+    });
+  }
+  if (value.outcome === "superseded" && !value.supersededByInteractionId) {
+    ctx.addIssue({
+      code: z.ZodIssueCode.custom,
+      path: ["supersededByInteractionId"],
+      message: "Superseded intents require the replacement interaction id",
+    });
+  }
+});
+
 export const issueDocumentKeySchema = z
   .string()
   .trim()